Radiation scattering integrated array antenna and mounting method

Abstract

The application provides a kind of radiation scattering integrated array antenna and mounting method, belongs to array antenna technical field, solve some problems existing in traditional antenna RCS reduction technology;The application includes antenna radiator, feed component, power division layer and mounting bottom plate, the structure of the antenna radiator adopts band-stop FSS structure, the band-stop FSS structure is used to show band-stop characteristic in antenna operating frequency band;The feed component is used to make the antenna radiator and the power division layer vertical interconnection, the mounting bottom plate is used to carry the power division layer;The FSS structure that shows band-stop characteristic in antenna operating frequency band is used as antenna radiator in the application, and the array, feed and mounting mode of such antenna radiator are given, both the radiation of antenna and the effect of shielding in-band electromagnetic wave are realized in antenna operating frequency band, so as to reduce the scattering of antenna structure to in-band radar wave.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of array antennas, and particularly relates to an array antenna integrating radiation and scattering and a mounting method. BACKGROUND

[0002] With the informationization development of modern battlefields, the stealth requirement of airborne platforms is also higher and higher, and airborne array antennas become an important scattering source influencing the stealth performance of platforms, so more and more attention is paid to improving the scattering characteristics of array antennas, i.e., reducing the radar cross section (RCS) of array antennas; in the RCS reduction research of array antennas, there is a contradiction between the emission of electromagnetic waves and the scattering of radar waves, so an array antenna integrating radiation and scattering is designed, which aims to guarantee good antenna radiation performance and meet the RCS reduction requirement at the same time.

[0003] In the prior art, there are some deficiencies in the RCS reduction technology of antennas: among them, a method of using a frequency selective surface (FSS) to shield electromagnetic waves to reduce the scattering of radar waves by the antenna structure to realize the RCS reduction of the antenna, which cannot solve the problem of in-band stealth of the antenna due to the need to guarantee the wave transmission in the working frequency band of the antenna; a method of using electromagnetic wave absorbing materials to absorb radar waves, which can realize a very narrow absorbing bandwidth, and since the electromagnetic waves are converted into heat energy by the absorbing materials, the absorbing materials are easily discovered by infrared detection devices; and a method of changing the shape of the antenna to make the scattering of radar waves deviate from the incident direction, which may damage the aerodynamic performance of the aircraft.

[0004] The method of using an FSS to shield electromagnetic waves to reduce the scattering of radar waves by the antenna structure to realize the RCS reduction of the antenna usually places the FSS structure above the antenna, and since the radiation characteristics of the antenna in the working frequency band need to be guaranteed, an FSS structure with a passband in the working frequency band of the antenna is used, so this method cannot realize the RCS reduction in the working frequency band of the antenna and cannot meet the requirement. SUMMARY

[0005] In order to solve the problems in the background art, the application proposes to use an FSS structure with a band-stop characteristic in the working frequency band of the antenna as an antenna radiator, and gives the array, feeding and mounting method of the antenna radiator, which realizes the radiation of the antenna and shields the electromagnetic waves in the working frequency band of the antenna, reduces the scattering of radar waves in the working frequency band of the antenna by the antenna structure, and thus solves the problem of RCS reduction in the working frequency band of the antenna.

[0006] The application adopts the following technical scheme to realize the purpose:

[0007] The application discloses an integrated array antenna of radiation scattering, which comprises an antenna radiator, a feeding assembly, a power division layer and a mounting base plate, the structure of the antenna radiator adopts a band-stop FSS structure which is used for exhibiting a band-stop characteristic in an antenna operating frequency band; the feeding assembly is used for vertically connecting the antenna radiator and the power division layer; and the mounting base plate is used for bearing the power division layer.

[0008] Specifically, the application further comprises a radio frequency connector which is arranged on a side surface of the mounting base plate away from the power division layer.

[0009] Further, the band-stop FSS structure is a hexagonal band-stop FSS structure which is used for realizing the band-stop characteristic in the antenna operating frequency band by adjusting parameters, and the parameters comprise a ring width, a circumference, a gap between rings and a thickness of a dielectric substrate of the hexagonal band-stop FSS structure.

[0010] Further, the feeding assembly is used for feeding the antenna radiator of the band-stop FSS structure to form a tightly-coupled array antenna.

[0011] Specifically, the feeding assembly adopts a welding-free feeding assembly which is used for realizing the vertical connection of the antenna radiator and the power division layer.

[0012] Specifically, the feeding assembly, the feeding points of the antenna radiator, the output ports of the power dividers in the power division layer and the contact points of the mounting base plate are all in elastic contact.

[0013] The application further provides an installation method of the integrated array antenna of radiation scattering.

[0014] S1, an antenna radiator printed board of the band-stop FSS structure and a power division layer printed board are obtained by using a printed board processing method.

[0015] S2, the antenna radiator printed board of the band-stop FSS structure is solidified on a cyanate ester base material.

[0016] S3, the power division layer printed board and the feeding assembly are fixed on the upper surface of the mounting base plate through the mounting positioning holes, and the feeding assembly is located on the side of the power division layer printed board away from the mounting base plate.

[0017] S4, the antenna radiator base plate obtained after solidification in the step S2 is adhered to the feeding assembly by using a glue film solidification method.

[0018] Specifically, in the step S3, a radio frequency connector is mounted on the lower surface of the mounting base plate, the inner core of the radio frequency connector is passed through the through hole reserved on the mounting base plate and then contacts the input port of the power divider in the power division layer, and the contact position is welded by using tin soldering.

[0019] Specifically, in step S3, the way of fixing the power-dividing layer printed board and the feeding assembly on the upper surface of the mounting base is a latch fixing way.

[0020] In summary, due to the adoption of the technical solution, the application has the following advantages:

[0021] 1. The design scheme of the application can solve the problem of RCS reduction in the band of the antenna without affecting the radiation performance of the array antenna, and can be applied to different frequency bands to solve the problem of RCS reduction in the band of the array antenna of different frequency bands.

[0022] 2. The array antenna radiator of the application is a periodic structure, simple in structure, easy to process, and the tight coupling array mode can realize a wide bandwidth.

[0023] 3. The array antenna solves the problem that the high density of feeding points on the radiator and the small spacing are not conducive to welding, and uses the feeding assembly to realize the vertical interconnection between the radiator and the power-dividing printed board, which is free of welding connection and reliable in connection. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 Fig. 1 is a structural schematic diagram of the array antenna of the application.

[0025] The meanings represented by the marks in the drawings are as follows:

[0026] 1-antenna radiator, 2-feeding assembly, 3-power-dividing layer, 4-mounting base, 5-radio frequency connector. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the application clearer, the technical scheme of the embodiments of the application will be described clearly and completely below in conjunction with the drawings in the embodiments of the application. Obviously, the described embodiments are part of the embodiments of the application, not all the embodiments. The components of the embodiments of the application described and shown in the drawings can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the application.

[0029] Embodiment 1

[0030] As Figure 1As shown, the array antenna with integrated radiation and scattering includes an antenna radiator 1, a feeding assembly 2, a power division layer 3, and a mounting base plate 4. The antenna radiator 1 has a band-stop FSS structure which is used to exhibit band-stop characteristics in the working frequency band of the antenna. The feeding assembly 2 is used to vertically connect the antenna radiator 1 and the power division layer 3. The mounting base plate 4 is used to support the power division layer 3.

[0031] To design the array antenna with integrated radiation and scattering, first, an FSS structure exhibiting band-stop characteristics in the working frequency band of the antenna is designed as the antenna radiator 1.

[0032] In this embodiment, the band-stop FSS structure is a hexagonal band-stop FSS structure. The hexagonal band-stop FSS structure is used to exhibit band-stop characteristics in the working frequency band of the antenna by adjusting parameters, including the ring width, circumference, gap between rings, and thickness of the dielectric substrate of the hexagon. The hexagonal band-stop FSS structure is not the only structure shape, and other forms of band-stop FSS structures can also be used, but they need to meet the requirement that the FSS stop band corresponds to the working frequency band of the antenna, so that the array antenna with integrated radiation and scattering can be realized.

[0033] The feeding assembly 2 is used to feed the antenna radiator 1 with the band-stop FSS structure to form a tightly coupled array antenna. Since the feeding point density on the antenna radiator is high and the spacing is small, the feeding assembly 2 without welding is used to vertically connect the antenna radiator 1 and the power division layer 3.

[0034] In this embodiment, the contact modes of the feeding assembly 2, the feeding points of the antenna radiator 1, the output ports of the power dividers in the power division layer 3, and the contact points of the mounting base plate 4 are all elastic contact. When the antenna radiator 1, the feeding assembly 2, the power division layer 3, and the mounting base plate 4 are fixed by extrusion, the feeding assembly 2 can transmit signals well. By adjusting the positions of the feeding points of the feeding assembly 2, the lengths of the feeding probes, and other parameters, the feeding matching can be completed, and the antenna can have good radiation in the working frequency band.

[0035] Meanwhile, the array antenna structure also includes a radio frequency connector 5 which is arranged on the side surface of the mounting base plate 4 away from the power division layer 3.

[0036] Embodiment 2

[0037] Based on embodiment 1, this embodiment specifically introduces the mounting method of the array antenna, including the following steps.

[0038] S1, the antenna radiator 1 printed board with the band-stop FSS structure and the power division layer 3 printed board are obtained by using the printed board processing method.

[0039] S2, the antenna radiator 1 printed board with the band-stop FSS structure is solidified on the cyanate ester base material.

[0040] S3, the power division layer 3 printed board and the feed assembly 2 are fixed on the upper surface of the installation base plate 4 through the installation positioning hole, and the feed assembly 2 is located on the side of the power division layer 3 printed board away from the installation base plate 4;

[0041] S4, the antenna radiator 1 substrate obtained after curing in step S2 is bonded on the feed assembly 2 by using the glue film curing method.

[0042] In the above process, the FSS form antenna radiator 1 and the power division layer 3 are both realized by printed board processing. Since the relatively thin printed board needs to be extruded and fixed on the feed assembly 2 with elastic contact points, the relatively thin FSS form antenna radiator 1 printed board is cured on the cyanate ester base material with a certain thickness.

[0043] In this embodiment, in addition to the above steps, the installation method of the whole antenna also includes:

[0044] In step S3, the radio frequency connector 5 is installed on the lower surface of the installation base plate 4, and the inner core of the radio frequency connector 5 contacts the power divider input port in the power division layer 3 after passing through the through hole reserved on the installation base plate 4, and the contact position is welded by using tin soldering; at the same time, the way of fixing the power division layer 3 printed board and the feed assembly 2 on the upper surface of the installation base plate 4 is the way of inserting the pin.

Claims

1. A radiation-scattering integrated array antenna, characterized in that: The device includes an antenna radiator, a feed assembly, a power distribution layer, and a mounting base. The antenna radiator adopts a band-stop FSS structure, which is used to exhibit band-stop characteristics within the antenna's operating frequency band. The feed assembly is used to vertically interconnect the antenna radiator and the power distribution layer, and the mounting base is used to support the power distribution layer. The band-stop FSS structure is a hexagonal band-stop FSS structure; The hexagonal band-stop FSS structure is used to achieve band-stop characteristics within the antenna operating frequency band by adjusting parameters, including: the ring width, perimeter, inter-ring gap, and dielectric substrate thickness of the hexagon. The feeding component is used to feed the antenna radiator of the band-stop FSS structure to form a tightly coupled array antenna; The power supply assembly is a solderless power supply assembly used to complete the vertical interconnection between the antenna radiator and the power layer; the contact method between the power supply assembly and the feed point of the antenna radiator, the output port of the power divider in the power layer and the contact point of the mounting base plate is elastic contact.

2. The integrated radiation and scattering array antenna according to claim 1, characterized in that: It also includes an RF connector disposed on the side surface of the mounting base plate away from the power layer.

3. A method for installing an integrated radiation and scattering array antenna, characterized in that, The method is used to install the array antenna as described in claim 1; the method includes the following steps: S1. Using printed circuit board processing, an antenna radiator printed circuit board and a power layer printed circuit board with a band-stop FSS structure are obtained; wherein the band-stop FSS structure is a hexagonal band-stop FSS structure; the band-stop characteristics of this hexagonal band-stop FSS structure are achieved in the antenna operating frequency band by adjusting the parameters. S2. The printed circuit board of the antenna radiator with a stop FSS structure is solidified on a cyanate ester substrate; S3. Fix the power layer printed circuit board and the power supply assembly to the upper surface of the mounting base plate through the mounting positioning holes, with the power supply assembly located on the side of the power layer printed circuit board away from the mounting base plate. The feeding assembly feeds the antenna radiator of the FSS structure with resistance; S4. The antenna radiator substrate obtained after curing in step S2 is bonded to the feed assembly using an adhesive film curing method; the feed assembly is a solderless feed assembly to achieve vertical interconnection between the antenna radiator and the power layer printed circuit board.

4. The method for installing an integrated radiation and scattering array antenna according to claim 3, characterized in that: In step S3, an RF connector is installed on the lower surface of the mounting base plate, and the inner core of the RF connector is passed through the pre-drilled through hole on the mounting base plate and then contacts the power divider input port in the power layer. The contact position is soldered using tin soldering.

5. The method for installing an integrated radiation and scattering array antenna according to claim 4, characterized in that: In step S3, the power layer printed circuit board and the power supply assembly are fixed to the upper surface of the mounting base plate by means of pin fixing.

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